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參數(shù)資料
| 型號(hào)： | MC44BC380 |
| 廠商： | Motorola, Inc. |
| 英文描述： | VHF/ UHF ANTENNA BOOSTER/SPLITTER IC |
| 中文描述： | 甚高頻/超高頻天線升壓器/分配器集成電路 |
| 文件頁(yè)數(shù)： | 6/10頁(yè) |
| 文件大小： | 425K |
| 代理商： | MC44BC380 |
6
MC44BC380 Technical Data
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
IC Block Diagram
5
IC Block Diagram
5.1
Proposed Booster/Splitter Schematic
Figure 3. Proposed Booster/Splitter Schematic
5.1.1 Components
1nF Capacitors: C1, C2, C3, C4, C5, C6, C8
10nF Capacitor: C7
Application dependant: L1, L2, R1, R2
5.1.2 Recommendations
A BALUN is required for this application
A single-sided PCB has been used to evaluate the device performance.
DecouplingcapacitorsC5andC6decreasecouplingbetweenTVOUTandVCRTUthroughtheVcc
line (bonding and PCB coupling) and increase TVOUT to VCRTU isolation (see proposed PCB
layout).
Pull-ups to Vcc may be needed on TVOUT and VCRTU pins to improve spurious performance at
low Vcc (1uH in series with 75
).
Resistive pull-ups can also be used to decrease gain and increase spurious performance. For
example, 267Ohms reduces gain by about 1dB and increases IMD value by 2 to 6dB. Trade-off
depends on application requirements.
This document contains information on a new product under development.
Motorola reserves the right to change or discontinue this product without notice.
1
2
3
4
5
6
7
8
TVOUT
VCRTU
O
O
ANTIN
O
C1
C2
C5
C6
C7
C8
Vcc
O
BALUN
Vcc
O
R2
L2
Vcc
O
R1
L1
C3
C4
F
Freescale Semiconductor, Inc.
n
.
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